December weather forecast
Guánica, PR

The last month of the year, December, is characterized by further reduction in rainfall amounts, marking the onset of the dry season properly. With the reduction in rain and humidity compared to the wet season months, December sees a transformation in the landscape of Guánica, allowing for varied experiences. The consistently warm temperatures combined with sufficient daylight hours create an inviting atmosphere for outdoor activities. Whether lounging on the beach or exploring the diverse flora and fauna, there is considerable enjoyment to be had in Guánica at this time of year. This pleasantly dry month bridges the gap between the old and the new year, bidding farewell to the lush wet season and welcoming the clear skies of the dry season.

Temperature

The advent of December brings an average high-temperature of a still warm 82.4°F (28°C), almost identical to the preceding month. An average low-temperature of 73.2°F (22.9°C) is noted in Guánica during the month of December.

Heat index

The heat index in December is evaluated at a hot 89.6°F (32°C). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in December is 78%.

Rainfall

In December, in Guánica, the rain falls for 16.3 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 224.9 rainfall days, and 23.58" (599mm) of precipitation is accumulated.

Snowfall

In Guánica, Puerto Rico, snow does not fall in January through August, October through December.

Ocean temperature

In Guánica, Puerto Rico, the average seawater temperature in December is 81.9°F (27.7°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is perceived as agreeably warm, making all water activities enjoyable without the risk of discomfort over lengthy durations.

Daylight

The month with the shortest days in Guánica, Puerto Rico, is December, with an average of 11h and 6min of daylight.
On the first day of the month, sunrise is at 6:43 am and sunset at 5:50 pm. On the last day of December, in Guánica, sunrise is at 6:58 am and sunset at 6:03 pm AST.

Sunshine

In December, the average sunshine is 7.4h.

UV index

The months with the lowest UV index in Guánica are January through March, November and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 6 during December translates into the following directions:
Resist overexposure. Safeguarding from solar damage is indispensable. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Notice! Sand and water reflections contribute to a stronger UV exposure.